Erlangshan Tunnel, Hailuogou, Gongga Mountain. According to Baidu map, Mianyang to Langzhong is 127 kilometers away from each other, tourist attractions include Erlangshan Tunnel, Hailougou, Gongga Mountain, Yanzigou, Yajia Terrier, Hongshitan, Luding Bridge, Zuiduo Pass, Xinduqiao, A哏坝, Quanhuatan, Tagong Temple and other places. Mianyang, also known as "China Science and Technology City", prefecture-level city in Sichuan Province, is located in the northwestern part of the Sichuan Basin, the upper and middle reaches of the Fuling River.